Sudoku problem-solving skills in primary schools

The skills of solving sudoku problems in primary schools can be used in formulas and intrauterine exclusion.

The formula of Sudoku is to wear nine shoes and one shoe, three left and seven right, two or four shoulders, eight or six feet and five in the middle. There is also a formula: "Don't forget to fill in the middle of the rising line in turn; Put it down when loading and unloading the box, and put it left when unloading the right box; The weight is filled in the box below, as is the upper right row. "

Intrauterine exclusion method: Exclusion method is a method to exclude the same number from peers, columns and other cells in the same uterus by using the rule that rows, columns and cells in Sudoku cannot be filled with the same number. Intrauterine exclusion is a method that aims at a uterus, excludes it with a certain number, and finally gets that only one cell in this uterus has a number.

Sudoku:

Sudoku is a mathematical game that originated in Switzerland in the18th century. It's a logic game with paper and pen. Players need to infer the numbers of all remaining spaces according to the known numbers on the 9×9 disk, and ensure that the numbers in each row, column and thick line palace (3*3) contain 1-9, which is not repeated.

Sudoku is nine palaces, and each palace is divided into nine squares. Give some known numbers and problem-solving conditions in this eighty-one box, and use logic and reasoning to fill in the numbers of 1-9 in other blanks. Make each number of 1-9 appear only once in each row, column and palace, so it is also called "Jiugongge".